A comprehensive evaluation of the integrated photocatalytic-fixed bed bioreactor system for the treatment of Acid Blue 113 dye

Himanshu Tiwari; Ravi Kumar Sonwani; Ram Sharan Singh

doi:10.1016/j.biortech.2022.128037

A comprehensive evaluation of the integrated photocatalytic-fixed bed bioreactor system for the treatment of Acid Blue 113 dye

Bioresour Technol. 2022 Nov:364:128037. doi: 10.1016/j.biortech.2022.128037. Epub 2022 Sep 26.

Authors

Himanshu Tiwari¹, Ravi Kumar Sonwani², Ram Sharan Singh³

Affiliations

¹ Department of Chemical Engineering & Technology, Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India.
² Department of Chemical Engineering, Indian Institute of Petroleum and Energy (IIPE), Visakhapatnam, Andhra Pradesh 530003, India.
³ Department of Chemical Engineering & Technology, Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India. Electronic address: rssingh.che@itbhu.ac.in.

PMID: 36174900
DOI: 10.1016/j.biortech.2022.128037

Abstract

This work investigated the performance of the integrated system (i.e., a Photocatalytic reactor followed by a Fixed bed bioreactor (PC-FBR)) for the degradation of complex Acid Blue 113 from wastewater. Initially, a Photocatalytic reactor was employed to improve the biodegradability index (i.e., BOD/COD) of wastewater from 0.21 ± 0.0062 to 0.395 ± 0.0058. The preliminary photocatalytic oxidation study revealed a maximum of 86.42 ± 0.33 % dye removal at TiO₂ loading of 1.5 g/L and an initial concentration of 50 mg/L of AB 113. An integrated reactor system significantly achieved a maximum of 92 ± 2.6 % of dye removal efficiency under a retention time of 120 hr. The stand-alone FBR dye shock loading study suggested that the reactor system was reasonably able to further restore its degradation efficiency. Langmuir-Hinshelwood kinetic model, Monod model, and Andrew-Haldane model were fitted. The bacterial toxicity assessment was carried out using the Pseudomonas fluorescens.

Keywords: Acid Blue 113 dye; Biodegradation; Fixed bed bioreactor; Pseudomonas fluorescens; Titanium (IV) oxide.